1. AEROSOLS REDUCE ATMOSPHERIC OXIDATION
Radiative and chemical (uptake HO2, NO2, NO3) effects of aerosols (sulfate, BC, OC, Dust, Sea-Salt)
GEOS-CHEM ~600 m
 OH (%)
March
August
Martin et al. [2003]

2. AEROSOL-CHEMISTRY RESEARCH PRIORITIES
EFFECT OF AEROSOLS ON CHEMISTRY
Improve understanding of aerosol phase (het + rad)
Constrain uptake rates and processes (esp. O3, HO2)
Function of particle history (i.e. coating of dust)
Explore halogen chemistry in MBL (esp BrOx)
Further constrain UV absorbing aerosols (BC, dust, OC?)
(optical depth, imaginary refractive index)
EFFECT OF CHEMISTRY ON AEROSOLS
Understand ultrafine particle formation
Improve emission inventories of NH3 (esp. temporal variation)
Examine nitrate formation in coupled model
Constrain estimates of secondary organic carbon formation
Examine chemical aging on aerosol hygroscopicity